feat: 实现密码重置功能与用户搜索API，优化注册登录流程

- 新增忘记密码页面与重置密码确认流程（前端+后端）
- 修复注册验证码页登录跳转路由
- 新增用户搜索API（按邮箱查询）
- 简化infra脚本，统一为app.sh
- 补充密码重置与用户API测试覆盖
- 更新runtime文档与AGENTS配置

apps/lib/core/router/app_router.dart

@@ -5,6 +5,7 @@ import 'go_router_refresh_stream.dart';
 import '../../features/auth/ui/screens/login_screen.dart';
 import '../../features/auth/ui/screens/register_screen.dart';
 import '../../features/auth/ui/screens/register_verification_screen.dart';
+import '../../features/auth/ui/screens/reset_password_screen.dart';
 import '../../features/home/ui/screens/home_screen.dart';
 import '../../features/messages/ui/screens/message_invite_list_screen.dart';
 import '../../features/messages/ui/screens/message_invite_detail_screen.dart';
@@ -67,6 +68,10 @@ GoRouter createAppRouter(AuthBloc authBloc) {
         path: '/register/verification',
         builder: (context, state) => const RegisterVerificationScreen(),
       ),
+      GoRoute(
+        path: '/reset-password',
+        builder: (context, state) => const ResetPasswordScreen(),
+      ),
       GoRoute(path: '/home', builder: (context, state) => const HomeScreen()),
       GoRoute(
         path: '/messages/invites',